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Commitments, Contingencies, And Guarantees (Net Realized Gains (Losses) Of Derivative Instrument Activity In Consolidated Statement Of Operations) (Detail) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||||||||||||
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Sep. 30, 2014
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Sep. 30, 2013
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Sep. 30, 2014
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Sep. 30, 2013
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| Commitments Contingencies And Guarantees [Line Items] | ||||||||||||||
| Net realized gains (losses) | $ (63) | $ 42 | $ (233) | $ 210 | ||||||||||
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Foreign Exchange Future [Member]
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| Commitments Contingencies And Guarantees [Line Items] | ||||||||||||||
| Net realized gains (losses) | 19 | (9) | 15 | 8 | ||||||||||
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All Other Futures Contracts And Options [Member]
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| Commitments Contingencies And Guarantees [Line Items] | ||||||||||||||
| Net realized gains (losses) | (15) | 6 | (55) | 46 | ||||||||||
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Convertibles and Bonds with Warrants Attached [Member]
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| Commitments Contingencies And Guarantees [Line Items] | ||||||||||||||
| Net realized gains (losses) | (17) | [1] | 6 | [1] | (13) | [1] | 7 | [1] | ||||||
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TBAs [Member]
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| Commitments Contingencies And Guarantees [Line Items] | ||||||||||||||
| Net realized gains (losses) | 0 | 1 | 0 | 1 | ||||||||||
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Investment And Embedded Derivative Instruments [Member]
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| Commitments Contingencies And Guarantees [Line Items] | ||||||||||||||
| Net realized gains (losses) | (13) | 4 | (53) | 62 | ||||||||||
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Guaranteed Living Benefits [Member]
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| Commitments Contingencies And Guarantees [Line Items] | ||||||||||||||
| Net realized gains (losses) | (80) | [2] | 134 | [2] | (126) | [2] | 563 | [2] | ||||||
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Single-Stock Future [Member]
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| Commitments Contingencies And Guarantees [Line Items] | ||||||||||||||
| Net realized gains (losses) | (15) | [3] | (90) | [3] | (103) | [3] | (393) | [3] | ||||||
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Options On Equity Market Indices [Member]
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| Commitments Contingencies And Guarantees [Line Items] | ||||||||||||||
| Net realized gains (losses) | 0 | [3] | (5) | [3] | (3) | [3] | (20) | [3] | ||||||
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Guaranteed Living Benefit And Other Derivative Instruments [Member]
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| Commitments Contingencies And Guarantees [Line Items] | ||||||||||||||
| Net realized gains (losses) | (50) | 38 | (180) | 148 | ||||||||||
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Other Derivatives [Member]
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| Commitments Contingencies And Guarantees [Line Items] | ||||||||||||||
| Net realized gains (losses) | $ 45 | $ (1) | $ 52 | $ (2) | ||||||||||
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